Apparatus for administering anesthetics.



Wanna No. 837,171. PATENTED NOV. 27, 1906. H. W. WOLFE. APPARATUS FORADMINISTERING ANESTHETIGS.

APPLICATION TILED MAR. 6, 1905. RENEWED OUT. 25, 1906.

HENRY WV. WOLFE, OF BALTIMORE, MARYLAND.

APPARATUS FOR ADMINISTERING ANESTHETICS.

Specification of Letters Patent.

Patented. Nov. 2'7, 1906.

Application filed March 6, 1905. Renewed October 25, 1906. Serial No.340,595.

To all whom it inn/y concern:

Be it known that I, HENRY W. WOLFE, a citizen of the United States,residing at Baltimore, in the State of Maryland, have invented certainnew and useful Improvements in Apparatus for Administering Anesthetics;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in sectional view of the upper halfof the central tube in the bulb, with the piston also in centralsection. Fig. 3 is an enlarged cross-sectional view on the line a: x ofFig. 1, and Fig.

41%? is a cross-sectional view on the line y 'y of While the preferredembodiment of my invention is illustrated in the accompanying drawingsand itsconstruction and operation are described in this specification,the right is reserved to make such changes from the construction shownand described herein as the scope of the claims hereunto appended willpermit.

Incarrying out my invention I provide a bulb or receptacle for holdingthe anesthetic, such as chloroform, through the center of which extendsa tube mounted on the lower stopper of the bulb. Said tube carries anaujustable stopper or cap for the other end of the bulb near its upperend. Longitudinally adjustable within said tube a plunger-pin ismounted, the lower end of said plunger being pointed and adapted toproject into and close a pointed nozzle or opening in the lower stopperof said bulb. The plunger is smaller than the inside of the tube at itslower portion, leaving a passage for the liquid which enters the tubethrough perforations therein at its base. Said tube is also providedwith. one or more perforations near its upper end, which register withperforations in the plunger, which in turn communicate with a centrallongitudinal passage in said plunger leading to the outside air. Thusair is admitted above the surface of the liquid in the vessel to preventthe creation of a vacuum therein as the liquid passes out. Adjustablemeans are also provided for stopping and regulating theflow of air intothe hull or vessel. Between the bulb and the mask is arranged a tubularconnection provided with a sightaperture preferably covered by glass.Said sight-aperture is arranged directly opposite the end of the pointednozzle, so that the flow of the liquid therethrough can be readilyobserved. The mask is provided with a series of perforations below theabsorbentchamber which are adapted to be partially or entirely closed bya similarly-perforated slide mounted around said mask. The perforationsand slide enable the attendant or operator to regulate the supply of airto the mask according to the kind and quantity of anesthetic that is tobe used in each particular case, the proportions of air and anestheticbeing different with different anesthetics.

Referring more particularly to the drawings, 1 indicates the bulb oranesthetic-receptacle provided with the filling-nozzle 1 2, the stopper,carrying the nozzle 3 below it and the tube 4 above. Said tube isscrewthreaded at its upper end, as at 5, and carries a similarlyscrew-threaded stopper or closure 6 for the bulb. The central portion ofthe interior ofsaid tube is also screwthreaded, as at 7, whereby thescrew threaded plunger-pin 8 is adjustable therein by turning the nut 9at its upper end. Said plunger-pin is reduced from its lower end up pastthe perforations 10 in the baseofthe tube, and the extreme lower end ofsaid plunger is preferably pointed to engage-the nozzle 3 and permit ofnice adjustments for dropping the liquid therethrough. The perforations11 near the upper end of the tube register with a broad circumferentialgroove 12 in the plunger, said groove extending above and .below saidperforations 11 to permit of the movement of said plunger within thetube without cutting off communication between theinterior of the bulband the inside air viathe central passage 13 in said tube communicatingwith said grooves 12 by means of the perforations 12 Said centralpassage 13 extends down past the apertures 12 and opens by port 14 onthe space in the tube around the lower restricted portion of the pluner. By this means should any of the Hound in the bulb become jostled orin any other manner get into the air-passages in the upper portion tubeand plunger said liquid will return by way of the central passage 13 tothe level of the liquid within the bulb. The outlet of said passage isadapted to be closed by a pin 15, screwthreaded or otherwise adjust'ablymounted in the end of the plunger.

The connection 16 between the bulb and the mask 17 is tubular in formand is pro vided with the glass-covered sight-aperture 18 thereinopposite the end of the nozzle.

The upper end of the passage through the: lower end of said tubularconnection is! flared, as at 19, to insure the free passage of 'theanesthetic therethrough'into the ab.

sorbent-chamber of the mask. The ab sorbent is retained in place by ascreen of anesthetic to suit the purpose may be administered and theamount being given at any time can easily be ascertained with absolutecertainty. It also permits of fine adjustments and allows the flow to bechanged or cut off entirely without removing the ap. paratus from theface of the patient.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In apparatus of the character described, the combination with a mask,of a vessel adapted to hold an anesthetic and a tubular connection,between said vessel and mask, provided with a sightglass, said vesselhaving a nozzle extending downward free from theinner walls of saidconnection, and means to regulate the flow of the anesthetic throughsaid nozzle.

2. In apparatus of the character described, the combination'with a mask,of a vessel adapted to hold an anesthetic, and a tubular connection'between said vessel and mask, provided with a sight glass, said vesselhaving a tapered nozzle extending downward free from the inner'walls ofsaid connection and means to regulate the flow of the anesthetic throughsaid nozzle.

3. In apparatus'of the character described, the combination with a mask,of a vessel adapted to contain an anesthetic and having a nozzle at itsbase, means to regulate the passage of said anesthetic through saidnozzle and a connecting-tube between said vessel and mask having asight-glass arranged opposite the end of said nozzle.

41. In apparatus of the character described, the combination with avessel adapted to hold an anesthetic, of a tube extending through saidvessel and having a'discharge- 'nozzle arranged below the base of saidvessel, said tube provided with perforations near the base of saidvessel for the passage of the anesthetic to the nozzle and otherperforations near the upper end thereof, an adjustable pin having itslower end of less diameter than the bore of said tube, for closing saidnozzle, said pin having a longitudinal passage communicating with theupper perforations in said tube, whereby air is admitted to said vessel,and means to cut ofi flow through said passage in said pin. a

5. In apparatus of the character described, the combination with avessel adapted to hold an anesthetic, of a tube extending through saidvessel and having a dischargenozzle arranged below the base of saidvessel', said tube provided with perforations near the base of saidvessel for the passage of the anesthetic to the nozzle and otherperforations near the upper end thereof, an adjust able pin, having itslower end of less diame ter than the bore of said tube, for closing saidnozzle, said pin having a longitudinal passage communicating with theupper perforations in said tube, whereby air is admitted to said vessel,and adjustable means to regulate the flow through said passage in saidpin.

6. In apparatus of the c aracter described, a vessel adapted to hold ananesthetic, a tube extending through said vessel and having adischarge-nozzle arranged below the base of said vessel, said tubeprovided with perforations near the base of said vessel, for the passageof the anesthetic to the nozzle, and other perforations near its upperend, an adjustable pin having its lower end of less diameter than thebore of said tube, said pin having a longitudinal passage communicatingwith the upper perforations of said tube whereby air is admitted to saidvessel, said passage extending below said upper perforations in thetube, and opening in the smaller-diametered portion of said pin, andmeans to out ofi the flow through said passage in said pin.

7. In an apparatus of the character described, the combination, with amask having an absorbent-chamber, of a vessel adapted to contain ananesthetic, a tubular connection, of less diameter than theabsorbentchamber, arranged between said chamber and the mask, means toregulate the flow of the anesthetic to the mask and a sight-glass insaid tubular connection whereby the flow of the anesthetic may beobserved.

8. In an apparatus of the character described, the combination with amask having an absorbent-chamber, of a vessel adapted to contain ananesthetic and having means to communicate with the mask, said maskformed of an integral piece flared to form a cup-shapedabsorbent-chamber and thence curved outward to form the mask proper,said mask provided with air-inlet openings at the juncture of saidabsorbent-chamber and the mask proper, a perforated slide mounted aroundsaid mask for the purpose specified, and means to regulate the flow ofthe anesthetic to the absorbent-chamber.

9. In apparatus of the character described, the combination of a vesseladapted to contain an anesthetic and having a tubular extension, of amask formed of an integral piece centrally connected to said tubularextension and flared to form a cup-shaped absorbent-chamber and thencecurved outward to form the mask proper, said mask provided withair-inlet openings at the juncture of said absorbent-chamber and themask proper, and a perforated slide mounted around said mask for thepurpose specified.

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY W. WOLFE. Witnesses:

WM.. R. LLEWELLYN, W. J. LLEWELLYN.

